Just as no two human beings are the same, no two criminal cases are the same. That's one reason why creating a one-size-fits-all solution or penalty under the law isn't always the best approach to take.
That's perhaps one reason why in Nashville and other jurisdictions in Tennessee, the judges who are responsible for meting out penalties for convictions of driving under the influence, whether it's for a misdemeanor offense or a felony DUI resulting from four convictions or more, are granted a certain amount of latitude.